Chipper spout



Jan. 25, 2 w. J. WHITE CHIPPER SPOUT Filed June 6. 1923 3 Sheets-Sheet l A TTORNE Y Jan. 25,1927. 1,615,530 W. .1. WHITE CHIPPER SPOUT Filed June a. 1923 3 Sheets-Sheet 2 & a? Y o INVENfOR TIViZ Zz'am .7. Win; ie

ATTORNEY Jan. 25, 1927.

W. J. WHITE CHIPPER SPOUT Filed June 6, 1923 3 Sheets-Sheet 5 Patented Jan. 25, 1927.

UNITED STATES PATENT OFFICE.

CHIPPER SPOUT.

Application filed June 6, 1923. Serial No. 643,710.

The present invention relates to chipper spouts and has been more particularly designed to provide an improved spout for use with pulp wood chippers.

In the manufacture of chemical wood pulp, the logs or slabs of wood after being passed through the barker are next passed into a chipper which cuts the timber into chips. These chippers are heavy, power driven machines and have a disc provided with a number of knives set along one face of the disc. It has been customary to feed the wood to the disc through an open spout. This spout is usually arranged in a vertical plane at an angle of approximately and the wood sliding down upon the disc under the influence of gravity, is cut off by the revolving knives. The purpose of the chipper is to cut smooth, clean chips about of an inch long, from the end of the pulp wood. Chips so formed are most suitable for use in continuing the process of paper making, andv any material which is removed in the form of saw-dust or small and bruised pieces is unsuited for making high quality paper. It must be rejected by the screens through which the material passes after leaving the chipper. The ordinary open spouts through which the pulp wood is supplied to the cutting knives must be made large enough to take care of the largest log which is to be chipped. When the logs are thrown into the spout they chatter and bounce away from the knives to some extent, the smaller pieces giving more trouble. This produces a larger quantity of inferior chips and saw-dust.

The present invention contemplates an improved arrangement of a chipper spout and chipper whereby the maximum amount of properly formed chips may be obtained from the pulp wood in an expeditious manner from the machine. The present invention also contemplates a chipper spout in which any sized piece of pulp wood may be securely held while being passed to the chipper, and also mechanically forcing the pulp wood toward the chipper so that the pulp wood can not rebound from the knives.

The invention also contemplates the provision of a chipper spout in which the operator can readily insert a piece of pulp wood of any size in an expeditious manner, whereupon the mechanism seizes the stick of wood and forces it against the chipper.

The accompanying drawings show, for purposes of illustration, a preferred embodiment of the present invention as applied to a chipper for pulp wood, it being understood that the drawings are illustrative of the invention rather than limiting the same. In these drawings: 1

Fig. l is a diagrammatic view illustrating a chipper and chipper spout;

Fig. 2 is a side view of the chipper spout taken in the direction of the arrow 2 01 Figs. 3, 5, and 6; v

Fig. 3 is the top plan view of the chipper spout and taken in the direction of the arrow 3 in Figs. 2 and 5;

Fig. 1 is a side view of the driving gears and taken in the direction of the arrow 4. of Figs. 3 and 7 Fig. 5 is a section taken on the plane 5-5 of Figs. 3 and 6 looking in the direction of the arrows;

Fig. 6 is a sectional view taken on the plane of the line 6-6 of Figs. 2 and 5; and

Fig. 7 is a side view illustrating the gears and the gear box and is taken in the direction of thecarrow 7 of Figs. 3 and 4.

In Figure 1 a chipper is illustrated diagrammatically. The main shaft 10 or the chipper is shown as mounted in bearings 11 and 12 supported on suitable base 13. The shaft may be driven by a pulley 14 or in any suitable manner, and carries a heavy disc 15 on which are mounted a plurality of cutting knives 16. The function of the chipper, as above stated, is to cut the pulp wood int-o chips. The disc is surrounded by suitable casing 1'7 and the pulp wood is fed downwardly through to the cutting knives through a chute or spout 18. The present invention relates more particularly to this chute or spout and to it arrangement relative to the cutting knives of the chipper.

The principal element of the spout is a heavy cast metal tubular member having a lower end 21 which is cut obliquely to the axis of the member 20 and obliquely to the normal of the axis. The spout may then be mounted alongside the disc in such a manner that the spout is in a plane oblique to both the horizontal and vertical. The logs may then be presented to the chipping knives at the most advantageous angle so as to shear off the chips in the best manner and with the least use of power.

The spout has a generally rectangular shaped axial opening 22 through which the pulp wood is to be passed to the chipper. The corners of the opening 22 may, if desired, be of the shape shown or of any other convenient shape. The lower wall 23 and the upper wall 24 of the opening 22 are preferably made flat and parallel as indicated in the drawing. The terms upper and lower are used as a matter of convenience, the parts being generally disposed in oblique planes.

The casting 20 is tubular for considerable distance from the oblique end 21, and is tubular at the upper end 25. The intermediate portion of the tubular member 20, however, is cut away as shown at 26 so as to leave open side walls and an open top. The intermediate portion of the lower surface 23 of the chute is slotted as indicated at 27 and 28 to accommodate a pair of rollers 29 and 30 mounted on shafts 31 and 32 carried in pairs of boxes 33 and 34 underneath the member 20. These shafts are provided with gears 35 and 36, each of which mesh with an idler 37, mounted on a stud 38, carried 011 the lower side edge of the member 20. This train of gears rs driven through a shaft 39 in a manner to be described. The rollers 29 and 30 are provided with a number of spikes 40 which project above the floor 23 of the 'tube 22.

Alongside each of the pairs of bearing boxes 33 and 34, the member 20 is provided with lugs 41, 42, 43, and 44. Between these lugs are flanges and 46 which serve to reinforce the member 20 and to provide wider bearings for the shafts 31 and 32. The upper side 47 of the casting 20 is provided with a pair of bridges 48 and 49 which span the intermediate cut-away portion 26.

A frame 50 adapted to fit into the cutaway portion 26 is provided with four lugs 51., 52, 53, and 54 disposed directly above the lugs 41, 42, 43, and 44. The former lugs are provided with rods 55, 56, 57, and 58 fastened to the frame by means of nuts as shown. These rods extend through apertures 59 in the lower set of lugs and permit the frame 50 to move toward or away from the lower side of the chute or trough. The lugs 51, 52 53, and 54 are each provided end 83 of a reciprocable rod with projecting portions which overlie the outer surfaces of the member 20. The parts just described provide guiding means which permit the frame 50 to move up or down as desired. The actuating means for moving the frame will be described below. The lower side edges of the frame 50 are provided with steel plates 50 fastened in place by rivets 51. These plates are notched as shown at 52' and 53 (Fig. 2) to permit them to pass below the shafts 3i and 32 of the lower set of rollers, The lower part of the member 20 is slotted as shown at 54 and 55 to accon'nnodate these steel plates.

The frame 50 is slotted as indicated at 61 and to acconnnodato an upper pair of rollers 63 and 64 which are disposed opposite the lower pair of rollers and are provided with spikes projecting below the surface of the frame 50. The upper rollers are mounted on shafts 65 and 66, mounted in suitable bearing boxes 67 and (58 on the upper surface of the member 50. These shafts are provided with gears (59 and 70 which mesh with an intermediate idler 71 mounted on a stud 72 carried on the outer edge of the frame 50. This gear train is driven through a shaft 73 in a manner to be described.

In order to move the frame so as to ch: the spacing of the sets of rollers, a suitable mechanism is provided which in the present case takes the form of a link motion. The upper side of the frame 50 is provided, near its corners, with four upstanding lugs T4 to each of which is pivoted a link 7 5. The links 7 5 are in turn each pivoted to rocker arms 76, mounted on shafts 77 and 78., carried in the bridge members 48 and 49. The shafts 77 and 78 are in turn connected by means of rocker arms T9 and 80 with links 81 and 82 which are attached to the upper This rozl passes downwardly through an aperture in the frame member 50 and an aperture 86 in the flange and is provided near the lower end with a lug 87 connected by means of a short link 38 with an operating lever 89 pivotally mounted at 90 on a bracket 91, mounted on the flange 45.

The driving means for the above de scribed gear trains will now be described. A gear box designated generally by the letter G is mounted on an appropriately located fixed portion 92 of the machine. As shown in Figs. 3, 4, and 7 the gear box is in the form of an open frame having a base member 93 bolted to the fixed portion 92 of the machine, and having side members 94 and 95. A gear train is mounted on shafts carried in this frame. The driving gear is shown at 96 as being mounted on ashaft 97 carried on extensions 98 of the side members 94 and 95. The gear 96 meshes with a pinion 99 mounted on a shaft 100,

carried in the lower part of the frame. The shaft 100 is preferably placed in alignment with the shaft 39 of the lower set of rollers and is coupled to it by a coupling 101. This provides a direct drive for the lower set of rollers. In order to drive the upper set of rollers, the shaft 100 is provided with a gear 102 which meshes with a gear 103 of the same size carried in shaft 104:,

. mounted on the upper part of the frame members 94 and 95. The outer end 105 of the shaft 104 is connected to one side of a universal joint 106 the other side of which is connected to an oblique shaft 107. This shaft is hollow as shown at 108 and telescopically engages a square shaft 109 which is connected to one side 110 of a universal coupling 111. The other side of this universal coupling is connected to the shaft 73 which drives the upper train of gears. The upper end of the spout may be supported by a brace 112, if desired.

The operation of the chipper spout is as follows. The pulp wood is brought to a convenient position to be placed into the spout in any customary Way. The operator then picks up the log, passes it into the upper open end of the spout, pulls the lever 89 to operate the link mechanism interconnecting the lever and the frame 50 so as to lift the frame 50 to a suflicient extent to permit the log to pass between the fixed and movable sets of spiked rollers. As soon as the log rests on the lower set of rollers, the spikes engage the wood and begin to move the log down through the chute. The operator then releases the frame and the weight of the log and parts carried thereby are sufficient to permit the same to drop down onto the upper side of the log. The power drive is timed so as to drive the rollers in unison and the log is forced downwardly through the chute by the spiked rollers. As the log is driven through the spout by the rollers, the operator inserts another stick of pulp wood immediately behind the one passing through. If this stick is smaller than the preceding stick, the upper set of rollers will drop onto it and seize it as soon as the preceding stick has passed on beyond the rollers 64 and 80. The power is then applied to the incoming log which forces the remaining portion of the first log on down toward the knives in a positive manner. If the incoming log is larger than the log already in the spout, the preferable mode of operation is to leave the spiked rollers in engagement with the first log as long as possible and to lift the upper set of rollers by the operating lever 89 sufficiently to thrust the log down between them.

It will be noted that the pulp wood is held firmly in position by the rollers, also that it is mechanically forced toward the chipper at all times. In this manner there is little likelihood of the wood chattering about in the lower end of the spout or bouncing away from the knives on the cut ting disc. Hence, the chips which are removed by the knives are clean, even chips with a minimum of saw-dust or bruised material.

The structural embodiment of the invention may, of course, take various forms to suit the machines used, and certain parts may be eliminated without departing from the spirit and scope of the invention.

What is claimed is:

1. The combination with the revolving disc and cutting knives of a pulp wood chipper, of a spout for supplying the wood to be chipped, one side of the spout being fixed and the other movable, and power driven means for forcing the pulp wood toward the knives, said means being carried on both sides of the spout, whereby different sized pieces of pulp wood may be forced toward the knives.

2. The combination with the revolving disc and cutting knives of a pulp wood chipper, of a spout for supplying the wood to be chipped, one side of the spout being fixed and the other movable, spiked rollers carried on both sides of the spout, and driving means for the rollers.

3. A spout for a pulp wood chipper, said spout having an obliquely disposed fixed trough, and devices for reciprocation at right angles with respect to the trough, said devices being so located that they approach the trough under the influence of gravity to constrict the spout to the size of the pulp Wood, said devices being provided with power driven rollers for continuously forcing the pulp wood against the chipper at a uniform speed.

4-. A spout for a pulp wood chipper, said spout having an obliquely disposed fixed trough, devices for reciprocation at rigl'it angles with respect to the trough, said devices being so located that they approach the trough under the influence of gravity to constrict the spout to the size of the pulp wood, said devices being provided with power driven rollers for continuously forcing the pulp wood against the chipper at a uniform speed, and mechanism for raising the devices.

5. A spout for a 3111p wood chipper, said spout having a fixed trough through which the wood is fed to the chipper, a set of rollers disposed across the bottom of the trough, a set of rollers disposed across the top of the trough, the upper set of rollers being mounted on a frame, guides for the frame to permit the upper set of rollers to move toward the lower set under the influlit! ence of gravity, manually operable devices for lifting the frame, andmeans for driving the rollers in unison.

6. A spout for a chipper or the like, having a set of rollers disposed across one side of the spent and mounted on fixed axes, a set of rollers disposed across the other side of the spout and mounted on a frame to rotate about centers fixed on the frame, and means associated with the frame and spout to permit moving the frame and associated rollers to change the distance between the sets of rollers, said means including a plurality of guides and a manually operable device for raising the frame.

7. A spout for a chipper or the like, having a set of rollers disposed across one side of the spout and mounted on fixed axes, a set of rollers disposed across the other side of the spontand mounted on a frame, and means associated with the frame and spout to permit changing the distance between the sets of rollers, said means including a lever, parallel-link motion for raising the frame, and a plurality of guides interconnecting the frame and spout.

S. A spout for a chipper or the like, having a set of rollers disposed across one side of the spout and mounted on fixed axes, a set of rollers disposed across the other side of the spout and mounted on a frame to rotate about centers fixed on the frame, means associated with the frame and spout to permit moving the frame and associated rollers to change the distance between the sets of rollers, said means including a man ually operable device for raising the frame, the frame lowering under the influence of gravity, a source of power, and driving means interconnecting the source of power with the two sets of rollers and automatically compensating for the changing position of the latter set of rollers.

9. A spout for a chipper or the like, having a set of rollers disposed across the lower side of the spout and mounted on fixed axes, a set of rollers disposed across the upper side of the spout and mounted on a frame to rotate about centers fixed on the frame, means associated with the frame and spout to permit moving the frame and associated rollers to change the distance between the sets of rollers, a gear box mounted alongdo the spout, driving connections from the gear box to the lower set of rollers, and driving connections including universal joints for the upper set of rollers.

10. A, spout for a chipper or the like, having a set of rollers disposed across one side of the spout and mounted on fixed axes, a set of rollers disposed across the other side of the spout and mounted on a frame, guides between the frame and spout to permit changing the distance between the sets of rollers, an operating member, and a parallellink motion interconnected to the operating member, the spout, and the frame.

11. A spout for a chipper or the like, having a set of rollers disposed across one side of the spent and extending into the spout, the spout being cutaway from adjacent the rollers to the other side, a frame guided for transverse reciprocation and having parts to replace the cut away portions of the spout, and a second set of rollers mounted on said frame and extending into the spout.

12. A spout for a chipper or the like, hav ing a set of rollers disposed across one side of the spout and extendirn into the spout, the spout being cut away from adjacent the rollers to the other side, a frame guided for transverse reciprocation and having parts to replace the cut away portions of the spent, a second set of rollers mounted on said frame and extending into the spout, a longitudinal brie member spanning the cut away portion, and link mechanism connecting the frame and bridging member for reciprocating the frame.

13. A spout for a chipper or the like, hav ing a set of rollers disposed across one side of the spout and extending into the spout, the spout being cut away from adjacent the rollers to the other side, a frame guided for transverse reciprocation and having parts to replace the cut away portions of the spout, a second set of rollers mounted on said frame and extending into the spout, and driving means for both sets of rollers.

14. A spout for a chipper or the like, having a set of rollers disposed across one side of the spout and extending into the spout, the spout being cut away from adjacent the rollers to the other side, a frame guided for transverse reciprocation and having parts to replace the cut away portions of the spout, a second set of rollers mounted on said frame and extending into the spout, and driving means for both sets of rollers, said driving means including a flexible drive for the movable set of rollers.

15. In combination, in a chipper spout, a lower set of rollers, an upper set of rollers, a frame for the upper set of rollers, guides for the frame, and depending side members carried by the frame and extending to the lower set of rollers.

16. In con'ibination, in a chipper spout, a lower set of rollers, an upper set of rollers, a frame for the upper set of rollers, guides for the frame, and depend ng side members carried by ti 2 frame and extending to the lower set of rollers, the side n'ien'iljiers being slotted to accon'miodate the shafts of the lower set of rollers.

17. In combination, in a chipper spout, a lower set of rollers, an upper set of rollers, a frame for the upper set of rollers, guides for the frame, and depending side members carried by the frame and extending to the llI-i lower set of rollers, rods carried by the frame outside the spout, and apertured lugs near the lower edges of the spout, the rods being guided in the lugs.

18. In combination, in a chipper spout, a lower set of rollers, an upper set of rollers, a frame for the upper set of rollers, guides for the frame, and depending side members carried by the frame and extending to the lower set of rollers, rods carried by the frame outside the spout, apertured lugs near the lower edges of the spout, the rods being guided in the lugs, and depending side memers carried by the frame and extending to the lower set of rollers.

WILLIAM J WHITE 

